Ancient Milky Way Merger
About 12 billion years ago, a dwarf galaxy known as LKH collided with a young Milky Way and merged with it. This artist’s concept portrays that collision. NASA’s Hubble Space Telescope uncovered definitive evidence of this collision by studying globular star clusters.
The text is NASA’s caption.
From NASA’s Image of the Day. NASA’s own photos are generally not protected by copyright; each one keeps NASA’s credit line, and pictures credited to anyone else are left out. NASA does not endorse this site. nasa.gov ↗
Rational